Automatic calibrating device for gas detection alarm

Abstract

The utility model provides an automatic calibrating device for a gas detection alarm, which comprises a plurality of gas cylinders filled with standard substance gas; the gas cylinder is communicated with the first gas collecting cabin, and gas in the gas cylinder can be input into the first gas collecting cabin; the second gas collecting cabin is communicated with the first gas collecting cabin, and gas in the first gas collecting cabin can be input into the second gas collecting cabin; and the detection alarm mechanism is communicated with the second gas collecting cabin, gas in the second gas collecting cabin can be input into the detection alarm mechanism for detection, the utility model discloses the automatic calibrating device for the gas detection alarm, and the automatic calibrating device for the gas detection alarm can efficiently and accurately carry out quantity value transmission, so that the labor force is greatly liberated. The work efficiency of verification and the reliability and accuracy of verification work are improved, and personal errors are reduced. And through the improvement of the detection means, the further improvement of the verification regulation is promoted.

Description

Technical Field

[0001] The utility model relates to the field of gas detection, in particular to an automatic calibration device for a gas detection alarm. Background Art

[0002] Carbon monoxide, methane, hydrogen sulfide, oxygen and other combustible and explosive harmful gases are one of the sources of major safety accidents in steel smelting, coal, oil and gas exploration and mining, and chemical production. With the increasing awareness of "safe production, people-oriented", this type of four-in-one gas alarm is widely used in the operation process of these fields, so as to take preventive measures in time to avoid accidents.

[0003] The existing four-in-one gas alarm may have problems such as abnormal alarm function, out-of-tolerance indication and failure of core component sensor during use, thus affecting production safety. Utility Model Content

[0004] The utility model aims to provide an automatic calibration device for a gas detection alarm, which realizes more efficient calibration of the alarm.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic calibration device for a gas detection alarm, comprising: a plurality of gas cylinders, wherein the gas cylinders are filled with standard substance gas; a first gas collection chamber, wherein the gas cylinders are connected to the first gas collection chamber, and the gas in the gas cylinders can be input into the first gas collection chamber; a second gas collection chamber, wherein the second gas collection chamber is connected to the first gas collection chamber, and the gas in the first gas collection chamber can be input into the second gas collection chamber; a detection alarm mechanism, wherein the detection alarm mechanism is connected to the second gas collection chamber, and the gas in the second gas collection chamber can be input into the detection alarm mechanism for detection.

[0006] Furthermore, it also includes a first solenoid valve and an air chamber, the gas cylinder filled with the same gas is connected to one of the gas chambers at the same time, the gas chamber is connected to the gas collection cabin, the first solenoid valve is arranged between the gas cylinder and the gas chamber, and the first solenoid valve can control the connection state between the gas cylinder and the gas chamber.

[0007] Furthermore, it also includes a first pressure reducing valve, which is arranged between the gas cylinder and the first solenoid valve. The gas output from the gas cylinder is reduced in pressure by the first pressure reducing valve and then output to the first solenoid valve.

[0008] Furthermore, it also includes an air compressor and a first isolation solenoid valve, and the air compressor is connected to the first air collection chamber through the first isolation solenoid valve.

[0009] Furthermore, it also includes a nitrogen cylinder, a second pressure reducing valve and a second solenoid valve, and the nitrogen cylinder, the second pressure reducing valve and the second solenoid valve are connected in sequence and then connected to the first gas collection cabin.

[0010] Furthermore, it also includes a first pressure transmitter and a third solenoid valve, wherein the first pressure transmitter and the third solenoid valve are arranged between the air chamber and the first air collection cabin, the first pressure transmitter can detect the pressure of the gas output from the air chamber to the first air collection cabin, and the third solenoid valve can control the connection state between the air chamber and the first air collection cabin.

[0011] Furthermore, it also includes a second pressure transmitter and a second isolation solenoid valve, the second pressure transmitter and the second isolation solenoid valve are arranged between the first gas collection cabin and the second gas collection cabin, the second pressure transmitter can detect the pressure of the gas output from the first gas collection cabin to the second gas collection cabin, and the second isolation solenoid valve can control the connection state between the first gas collection cabin and the second gas collection cabin.

[0012] Furthermore, it also includes a fourth solenoid valve and a rotor flowmeter, which are arranged between the second air collection cabin and the detection alarm mechanism, and the rotor flowmeter can detect the pressure of the gas output by the detection alarm mechanism of the second air collection cabin box, and the fourth solenoid valve can control the connection state between the second air collection cabin and the detection alarm mechanism.

[0013] Furthermore, it also includes an exhaust valve and an exhaust fan. The second air collection cabin is connected to the detection alarm mechanism through the exhaust valve, and the detection alarm mechanism is connected to the exhaust fan. The gas in the second air collection cabin can be discharged through the detection alarm mechanism through the exhaust valve and the exhaust fan.

[0014] It can be seen from the analysis that the utility model discloses an automatic calibration device for gas detection alarms. The utility model can efficiently and accurately transfer the value, which greatly liberates the labor force. It improves the efficiency of the calibration work as well as the reliability and accuracy of the calibration work, and reduces human errors. Through the improvement of the detection means, it is achieved to promote the further improvement of the calibration procedures. The standard gas prepared by the device can save a lot of standard gas and greatly reduce the operating costs. It solves the problems of difficult traceability, high cost, and long cycle of composite safety detection alarms. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0016] Figure 1 A schematic structural diagram of an embodiment of the utility model.

[0017] Explanation of the reference numerals in the accompanying drawings: 1. Gas cylinder; 2. First gas collection cabin; 3. Second gas collection cabin; 4. Detection and alarm mechanism; 5. First solenoid valve; 6. Air chamber; 7. First pressure reducing valve; 8. Air compressor; 9. First isolation solenoid valve; 10. Nitrogen cylinder; 11. Second pressure reducing valve; 12. Second solenoid valve; 13. First pressure transmitter; 14. Third solenoid valve; 15. Second pressure transmitter; 16. Second isolation solenoid valve; 17. Fourth solenoid valve; 18. Rotor flowmeter; 19. Exhaust valve; 20. Exhaust fan. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0019] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0020] One or more examples of the utility model are shown in the attached drawings. The detailed description uses numbers and letters to refer to the features in the drawings. Similar or similar marks in the drawings and descriptions have been used to refer to similar or similar parts of the utility model. As used herein, the terms "first", "second", "third", and "fourth" are used interchangeably to distinguish one component from another, and are not intended to indicate the position or importance of individual components.

[0021] like Figure 1As shown, according to an embodiment of the utility model, there is provided an automatic calibration device for a gas detection alarm, comprising: a plurality of gas cylinders 1, wherein the gas cylinders 1 are filled with standard material gas; a first gas collection chamber 2, wherein the gas cylinders 1 are connected with the first gas collection chamber 2, and the gas in the gas cylinders 1 can be input into the first gas collection chamber 2; a second gas collection chamber 3, wherein the second gas collection chamber 3 is connected with the first gas collection chamber 2, and the gas in the first gas collection chamber 2 can be input into the second gas collection chamber 3; and a detection alarm mechanism 4, wherein the detection alarm mechanism 4 is connected with the second gas collection chamber 3, and the gas in the second gas collection chamber 3 can be input into the detection alarm mechanism 4 for detection.

[0022] By connecting two interconnected gas collection chambers, the gases of each standard substance are separated. The user can collect the gas in the first gas collection chamber 2 and then input it into the second gas collection chamber 3 through a pipeline, thereby separating the preparation end and the detection end. When testing the detection alarm mechanism 4, the gas supply is more controllable. The detection alarm mechanism 4 usually includes a gas alarm to be tested corresponding to the standard substance gas. For example, in steel smelting production, alarms such as carbon monoxide detection alarms and hydrogen sulfide gas detection alarms are usually required. Take the calibration of carbon monoxide and hydrogen sulfide gas as an example. After the gases of different concentrations are connected to the pipelines respectively, when the carbon monoxide alarm needs to be calibrated, the system can select the carbon monoxide standard gas of different concentrations separately, and open the solenoid valve to connect it to the calibration system pipeline and the gas collection chamber. If the pressure in the pipeline process node shows that it meets the requirements, the gas supply to the meter being tested can be started, and the calibration work can be started. After the calibration is completed, the system automatically purges. If the system pressure is abnormal or the residual gas of the standard gas is insufficient, resulting in a sharp drop in the pressure after entering the gas collection chamber 6 and not meeting the calibration conditions, the system will first close the selected standard gas solenoid valve to close it, and then fully open the pipeline solenoid valve to release and purge the gas to ensure that the gas in the gas collection chamber 6 is clean. When it is changed to hydrogen sulfide gas, repeat the above operation.

[0023] It also includes a first solenoid valve 5 and an air chamber 6. The gas cylinder 1 filled with the same gas is connected to one air chamber 6 at the same time. The air chamber 6 is connected to the gas collection cabin. The first solenoid valve 5 is arranged between the gas cylinder 1 and the air chamber 6. The first solenoid valve 5 can control the connection state between the gas cylinder 1 and the air chamber 6.

[0024] Usually, each gas chamber 6 is connected to a gas cylinder 1 with the same gas type but different concentrations, thereby ensuring that each gas cylinder 1 outputs a single gas type, so as to facilitate the subsequent testing of the detection ability of the detection alarm mechanism 4 to the corresponding gas. By using gas cylinders 1 with different concentrations, the detection effect of the detection alarm mechanism 4 at different concentrations can be tested, and its working stability can be tested.

[0025] It also includes a first pressure reducing valve 7, which is arranged between the gas cylinder 1 and the first solenoid valve 5. The gas output from the gas cylinder 1 is reduced in pressure by the first pressure reducing valve 7 and then output to the first solenoid valve 5. The pressure reducing valve can reduce the exhaust pressure of the gas cylinder 1.

[0026] It also includes an air compressor 8 and a first isolation solenoid valve 9, and the air compressor 8 is connected to the first air collection cabin 2 through the first isolation solenoid valve 9. It also includes a nitrogen bottle 101, a second pressure reducing valve 11 and a second solenoid valve 12, and the nitrogen bottle 101, the second pressure reducing valve 11 and the second solenoid valve 12 are connected in sequence and connected to the first air collection cabin 2. The air compressor 8 and the nitrogen bottle 101 can meet the purging and pipeline cleaning requirements under different calibration conditions.

[0027] It also includes a first pressure transmitter 13 and a third solenoid valve 14, which are arranged between the air chamber 6 and the first air cabin 2. The first pressure transmitter 13 can detect the pressure of the gas output from the air chamber 6 to the first air cabin 2, and the third solenoid valve 14 can control the connection state between the air chamber 6 and the first air cabin 2. It also includes a second pressure transmitter 15 and a second isolation solenoid valve 16. The second pressure transmitter 15 and the second isolation solenoid valve 16 are arranged between the first gas collection chamber 2 and the second gas collection chamber 3. The second pressure transmitter 15 can detect the pressure of the gas output from the first gas collection chamber 2 to the second gas collection chamber 3. The second isolation solenoid valve 16 can control the connection state between the first gas collection chamber 2 and the second gas collection chamber 3. The first pressure transmitter 13 and the second are responsible for providing a pressure detection function for the pipeline to avoid calibration failure caused by insufficient pressure of the pressure source, and at the same time eliminate safety hazards. Usually, a temperature and humidity transmitter is also set when in use to detect the temperature and humidity of the gas. The temperature and humidity transmitter can realize automatic temperature and humidity perception, and its data is directly related to whether the calibration conditions are met and directly affects the environmental data in the electronic records.

[0028] It also includes a fourth solenoid valve 17 and a rotor flowmeter 18, which are arranged between the second air collection cabin 3 and the detection alarm mechanism 4. The rotor flowmeter 18 can detect the pressure of the gas output by the second air collection cabin 3 and the detection alarm mechanism 4, and the fourth solenoid valve 17 can control the connection state between the second air collection cabin 3 and the detection alarm mechanism 4.

[0029] It also includes an exhaust valve 19 and an exhaust fan 20. The second air collection cabin 3 is connected to the detection alarm mechanism 4 through the exhaust valve 19, and the detection alarm mechanism 4 is connected to the exhaust fan 20. The gas in the second air collection cabin 3 can be discharged through the detection alarm mechanism 4 through the exhaust valve 19 and the exhaust fan 20.

[0030] When the device is in use, each solenoid valve, pressure transmitter, and air compressor 8 are usually controlled by PLC. A 24V power supply is usually provided in the system to power the PLC, thereby realizing automatic control of the entire device.

[0031] Compared with the prior art, the utility model can efficiently and accurately transfer the value, which greatly liberates the labor force. It improves the work efficiency of the verification as well as the reliability and accuracy of the verification work, and reduces human errors. Through the improvement of the detection means, it can promote the further improvement of the verification procedures. The standard gas prepared by the device can save a lot of standard gas, and the operating cost is greatly reduced. It solves the problems of difficult traceability, high cost and long cycle of composite safety detection alarms.

[0032] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A gas detection alarm automatic calibration device, characterized in that: include: A number of gas cylinders containing standard substance gas; a first gas collection chamber, the gas cylinder being in communication with the first gas collection chamber, and the gas in the gas cylinder being able to be input into the first gas collection chamber; a second gas collection chamber, the second gas collection chamber is connected to the first gas collection chamber, and the gas in the first gas collection chamber can be input into the second gas collection chamber; A detection alarm mechanism is connected to the second gas collection chamber, and the gas in the second gas collection chamber can be input into the detection alarm mechanism for detection.

2. The automatic verification device for gas detection alarm according to claim 1 is characterized in that: It also includes a first solenoid valve and an air chamber. The gas cylinder filled with the same gas is connected to one of the gas chambers at the same time. The gas chamber is connected to the gas collection cabin. The first solenoid valve is arranged between the gas cylinder and the gas chamber. The first solenoid valve can control the connection state between the gas cylinder and the gas chamber.

3. The automatic verification device for gas detection alarm according to claim 2 is characterized in that: It also includes a first pressure reducing valve, which is arranged between the gas cylinder and the first solenoid valve. The gas output from the gas cylinder is reduced in pressure by the first pressure reducing valve and then output to the first solenoid valve.

4. The automatic verification device for gas detection alarm according to claim 1, characterized in that: It also includes an air compressor and a first isolation solenoid valve, and the air compressor is connected to the first air collection chamber through the first isolation solenoid valve.

5. The automatic verification device for gas detection alarm according to claim 1 is characterized in that: It also includes a nitrogen bottle, a second pressure reducing valve and a second solenoid valve. The nitrogen bottle, the second pressure reducing valve and the second solenoid valve are connected in sequence and then connected to the first gas collection cabin.

6. The automatic verification device for gas detection alarm according to claim 2, characterized in that: It also includes a first pressure transmitter and a third solenoid valve, which are arranged between the air chamber and the first air collection capsule. The first pressure transmitter can detect the pressure of the gas output from the air chamber to the first air collection capsule, and the third solenoid valve can control the connection state between the air chamber and the first air collection capsule.

7. The automatic verification device for gas detection alarm according to claim 1, characterized in that: It also includes a second pressure transmitter and a second isolation solenoid valve, which are arranged between the first gas collection cabin and the second gas collection cabin. The second pressure transmitter can detect the pressure of the gas output from the first gas collection cabin to the second gas collection cabin, and the second isolation solenoid valve can control the connection state between the first gas collection cabin and the second gas collection cabin.

8. The automatic verification device for gas detection alarm according to claim 1, characterized in that: It also includes a fourth solenoid valve and a rotor flowmeter, which are arranged between the second air collection cabin and the detection alarm mechanism. The rotor flowmeter can detect the pressure of the gas output by the detection alarm mechanism of the second air collection cabin box, and the fourth solenoid valve can control the connection state between the second air collection cabin and the detection alarm mechanism.

9. The automatic verification device for gas detection alarm according to claim 1, characterized in that: It also includes an exhaust valve and an exhaust fan. The second air collection cabin is connected to the detection alarm mechanism through the exhaust valve, and the detection alarm mechanism is connected to the exhaust fan. The gas in the second air collection cabin can be discharged through the detection alarm mechanism through the exhaust valve and the exhaust fan.

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